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      <a id="oscil1"></a>
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      <a id="IndexOscil1" class="indexterm"></a>
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        <h2>
          <span class="refentrytitle">oscil1</span>
        </h2>
        <p>oscil1 — 
      Accesses table values by incremental sampling.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp129061840"></a>
        <h2>Description</h2>
        <p>
      Accesses table values by incremental sampling.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp129063072"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">kres <span class="command"><strong>oscil1</strong></span> idel, kamp, idur [, ifn]</pre>
      </div>
      <div class="refsect1">
        <a id="idp129065232"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>idel</em></span> -- delay in seconds before <span class="emphasis"><em>oscil1</em></span> incremental sampling begins.
    </p>
        <p>
      <span class="emphasis"><em>idur</em></span> -- duration in seconds to sample through the <span class="emphasis"><em>oscil1</em></span> table just once. A zero or negative value will cause all initialization to be skipped.
    </p>
        <p>
      <span class="emphasis"><em>ifn</em></span> -- (optional) function table
      number. <span class="emphasis"><em>tablei, oscil1i</em></span> require the
      extended guard point.  The number defaults to -1 which indicates
      a sinewave.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp129070112"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>kamp</em></span> -- amplitude factor.
    </p>
        <p>
      <span class="emphasis"><em>oscil1</em></span> accesses values by sampling once through the function table at a rate determined by <span class="emphasis"><em>idur</em></span>. For the first <span class="emphasis"><em>idel</em></span> seconds, the point of scan will reside at the first location of the table; it will then begin moving through the table at a constant rate, reaching the end in another <span class="emphasis"><em>idur</em></span> seconds; from that time on (i.e. after <span class="emphasis"><em>idel</em></span> + <span class="emphasis"><em>idur</em></span> seconds) it will remain pointing at the last location. Each value obtained from sampling is then multiplied by an amplitude factor <span class="emphasis"><em>kamp</em></span> before being written into the result.
    </p>
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      <div class="refsect1">
        <a id="idp129075648"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the oscil1 opcode. It uses the file <a class="ulink" href="examples/oscil1.csd" target="_top"><em class="citetitle">oscil1.csd</em></a>.
      </p>
        <div class="example">
          <a id="idp129077504"></a>
          <p class="title">
            <strong>Example 559. Example of the oscil1 opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac      <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o oscil1i.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1

<span class="oblock">instr</span>     1   

ipanfn <span class="op">=</span> p4
asig   <span class="opc">vco2</span> .3, 220
kpan   <span class="opc">oscil1i</span> 0, 1, p3, ipanfn	<span class="comment">;create panning &amp;</span>
kleft  <span class="op">=</span> <span class="opc">sqrt</span>(kpan)		<span class="comment">;start right away</span>
kright <span class="op">=</span> <span class="opc">sqrt</span>(1<span class="op">-</span>kpan)     
       <span class="opc">outs</span> kleft<span class="op">*</span>asig, kright<span class="op">*</span>asig

<span class="oblock">endin</span>
<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
                                                                                  
<span class="stamnt">f</span> 1 0  3 -7 .5  3  .5		<span class="comment">;remain in center (.5 CONSTANT)                                                                          </span>
<span class="stamnt">f</span> 2 0 129 7  1 129 0 		<span class="comment">;left--&gt;right                                                                                                     </span>
<span class="stamnt">f</span> 3 0 129 7 .5  32 1 64 0 33 .5 <span class="comment">;center--&gt;left--&gt;right--&gt;center    </span>

<span class="stamnt">i</span> 1  0  2  1			<span class="comment">;use table 1</span>
<span class="stamnt">i</span> 1  3  2  2			<span class="comment">;use table 2</span>
<span class="stamnt">i</span> 1  6  2  3			<span class="comment">;use table 3</span>

<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
          </div>
        </div>
        <p><br class="example-break" />
     </p>
        <p>
      The example will produce the following output:
      </p>
        <pre class="screen">
 i1     0.50000
 i1     0.20000
 i1     0.80000
 i1     0.10000
 i1     0.90000
 i1     0.00000
 i1     1.00000
 i1     0.50000
      </pre>
        <p>
    </p>
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      <div class="refsect1">
        <a id="idp129083024"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="table.html" title="table"><em class="citetitle">table</em></a>,
      <a class="link" href="tablei.html" title="tablei"><em class="citetitle">tablei</em></a>,
      <a class="link" href="table3.html" title="table3"><em class="citetitle">table3</em></a>,
      <a class="link" href="oscil1i.html" title="oscil1i"><em class="citetitle">oscil1i</em></a>,
      <a class="link" href="osciln.html" title="osciln"><em class="citetitle">osciln</em></a>
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